F8V

HD 180314 is a star in the constellation Lyra. Its apparent magnitude is 6.61 and it is about 400 light years from the Sun. This is a K-type star with 2.48 times the mass of the Sun, 8.10 times the Sun's radius, and an effective temperature of about 5,000 K.The star is orbited by one substellar companion, HD 180314 b, an object with a minimum mass 22 times that of Jupiter and hence likely to be a brown dwarf. It orbits HD 180314 every 396 days with a semi-major axis of 1.4 AU.

HD 180902 b

HD 175443 is a 6th magnitude star in the constellation Lyra, approximately 410 light years away from Earth. It is an orange giant star of the spectral type K4III, meaning it possesses a surface temperature of 3,500 to 5,000 kelvins. It is cooler, yet larger and brighter, than our Sun.

G2IV

Zucker et al.

G1V

K0IV/M4V

HD 176871 is a 6th magnitude star in the constellation Lyra, approximately 700 light years away from Earth. It is a bluish white star of the spectral type B5V, meaning it possesses a surface temperature of 11,000 to 25,000 kelvins and is a dwarf star, like our Sun. Its surface is at least twice as hot as the Sun, and it is several thousand times as luminous.

HD 181433 is a star located approximately 87 light-years away in the constellation of Pavo (the Peacock). According to SIMBAD, it has a stellar classification of K3III-IV, which puts it on the borderline between being a red giant and a subgiant. This is inconsistent with the fact that its luminosity is only 0.308 times that of the Sun. Its entry in the Hipparcos catalogue lists a spectral type of K5V, classifying it as a dwarf star. As of 2008, three extrasolar planets are thought to be orbiting the star. There is currently little information on these planets. The name of this star comes from its identifier in the Henry Draper catalogue.

HD 185269 is a stellar triple system approximately 171 light-years away in the constellation Cygnus. It is easily visible to binoculars, but not the naked eye.The primary star is a quarter more massive and four times more luminous than our local star. The spectrum of the star is G0IV.

G8III / G8V / K1V

Announced

Johnson et al.

G5IV/V

HD 177830c

HD 180262 A

G0IV

G0Ib

G8IV

HD 176051 A

K0III/IV

HD 175167 b is an extra-solar planet orbiting HD 175167, which is a G type star within the Pavo constellation around 219 light years away from the Earth. The planet was discovered by the Magellan Planet Search Program as the astronomical object fit the Keplerian orbital model. During the observations 13 doppler velocity tests were conducted, which showed this object’s size was at least 7.8 Jovian-masses and its orbit has a high eccentricity. The exoplanet takes 3.53 years to complete a full stellar orbit.

HD 179791 is suspected variable star in the equatorial constellation of Aquila.

HD 175535 is a star in the constellation Draco. Its apparent magnitude is 4.92.

Hubble Legacy Archive

HD 175167b

HD 175541b

HD 173417 is a 6th magnitude star in the constellation Lyra, approximately 169 light years away from Earth. It is a yellowish white giant or subgiant star of the spectral type F1III-IV. It therefore has a surface temperature of 6,000 to 7,500 kelvins and is hotter, larger, and several times brighter than our Sun.

A3V

HD 175167 b

HD 181068 Bb

HD 173416b

HD 179949 b

HD 175541 is an intermediate-mass subgiant star in the constellation Serpens. That means when this star was a main-sequence, it was an A-type star. It is an 8th magnitude star about 410 light years from Earth. Despite its distance of over 100 ly, It was given the number 736 in the Gliese Catalogue of Nearby Stars.In April 2007, the planet was found orbiting around one of the three preferred intermediate-mass subgiants that has changes in radial velocity trends, from Lick and Keck Observatories in Mount Hamilton (California) and Mauna Kea (Hawai'i), United States.

HD 179079 b is an extrasolar planet which orbits the G-type subgiant star HD 179079, located approximately 208 light years away in the constellation Aquila. This planet has mass only 1/12 that of Jupiter or 1.5 times Neptune. The planet orbits very close to the star, at a distance of 0.11 AU. This planet takes two weeks to revolve around the star. This planet was discovered using the Keck telescopes on August 12, 2009.

HD 178911 Bb is a planet discovered in 2001 by Zucker who used the radial velocity method. The minimum mass of this giant planet is 7.35 times that of Jupiter that orbits close to the star. The period of the planet is 71.5 days and the semi-amplitude is 346.9 m/s.

HD 178233 is a 6th magnitude star in the constellation Lyra, approximately 133 light years from Earth. It is a white giant star of the spectral type F0III, meaning it possesses a surface temperature of 6,000 to 7,500 kelvins. It is hotter, much bigger, and much brighter than our Sun.

HD 183263 is an 8th magnitude subgiant star located approximately 180 light-years away in the constellation Aquila. This star is about to or already ran out of hydrogen fuel and eventually becomes a red giant and then dies as a white dwarf. It has absolute magnitude (apparent magnitude at 10 pc) of 4.25 compared to the Sun’s 4.83, which indicates the star is more luminous than our Sun, and therefore hotter by about 100 K.

HD 174569 is a spectroscopic binary star system in the equatorial constellation of Aquila.

HD 183263 c is an exoplanet orbiting approximately 4.25 AU from the parent star HD 183263. This planet was announced by Wright et al. on December 8, 2008 using multiple observations in Lick and Keck Observatories earlier in that year. This planet was calculated to have minimum mass of 3.82 times more than Jupiter and takes 8.08 years to revolve around the star. The orbital distance varies from 3.17 to 5.33 AU, corresponding to the orbital eccentricity of 0.253.

HD 180450 is a 6th magnitude star in the constellation Lyra, approximately 1,400 light years away from Earth. It is a red giant star of the spectral type M0III, meaning it has a surface temperature of about 3,500 kelvins. It is much larger and brighter, yet cooler, than our Sun. It is also a star in a star cluster.

HD 181068 Ba

HD 179949 is a 6th magnitude star in the constellation of Sagittarius. It is a yellow-white dwarf (spectral class F8 V), a type of star hotter and more luminous than our Sun. The star is located about 90 light years from Earth and might be visible under exceptionally good conditions to an experienced observer without technical aid; usually binoculars are needed.

HD 175541 b is a jovian planet located approximately 410 light-years away in the constellation of Serpens, orbiting the star HD 175541. This planet was discovered in April 2007.

HD 176051 B

K5V
HD 181433 is a star located approximately 87 light-years away in the constellation of Pavo (the Peacock). According to SIMBAD, it has a stellar classification of K3III-IV, which puts it on the borderline between being a red giant and a subgiant. This is inconsistent with the fact that its luminosity is only 0.308 times that of the Sun. Its entry in the Hipparcos catalogue lists a spectral type of K5V, classifying it as a dwarf star.

HD 181342b

HD 177809 is a 6th magnitude star in the constellation Lyra, approximately 700 light years away from Earth. It is a red giant star of the spectral type M2III, meaning it possesses a surface temperature of under 3,500 kelvins. In comparison to our Sun, it is much larger and brighter, but its surface is cooler.

HD 181433 d

HD 173416 b

HD 181720 is an 8th magnitude G-type main sequence star located approximately 190 light years away in the constellation Sagittarius. This star is larger, hotter, brighter, and less massive than our Sun. Also its metal content is three-tenths as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.

HD 177830 is a 7th magnitude binary star system located approximately 205 light-years away in the constellation of Lyra. The primary star is slightly more massive than our Sun, but cooler being a type K star. Therefore, it is a subgiant clearly more evolved than the Sun. In visual light it is four times brighter than the Sun, but because of its distance, about 205 light years, it is not visible to the unaided eye. With binoculars it should be easily visible.The primary star is known to have two extrasolar planets orbiting around it.

HD 172044 and BD+33°3154B are two components of a binary star system in the constellation Lyra, approximately 520 light years away from Earth. 5th magnitude HD 172044 is a giant or subgiant star with the spectral type B8II-IIIp... The "p..." signifies that the star has a peculiar spectrum and spectral peculiarities have yet to be described. It is bluish white in color and has a surface temperature of 11,000 to 25,000 kelvins. It is therefore at least twice as hot as our Sun on its surface, and many times brighter and larger in size. BD+33°3154B is an 11th magnitude star of an unknown spectral type.

K0III

HD 180902 is a K-type star HD 180902 approximately 323 light years away in the constellation Sagittarius. It has one planet, HD 180902 b.

HD 177808 is a 6th magnitude star in the constellation Lyra, approximately 610 light years away from Earth. It is a red giant star of the spectral type M0III, meaning it possesses a surface temperature of around 3,500 kelvins. It is therefore much larger and brighter than our Sun, yet cooler in comparison.

Bouchy et al.

HD 180262 is a wide double star in the equatorial constellation of Aquila. The pair have an angular separation of 89.823″.

HD 185269 b is a hot Jupiter extrasolar planet approximately 171 light years away in the constellation of Cygnus. The minimum mass is slightly less than Jupiter and the orbital period is about one week. Most hot Jupiters are thought to have undergone tidal circularization, making the eccentricity of HD 185269 b (e=0.3) unusual.

HD 181433c

HD 177830 is a 7th magnitude binary star system located approximately 205 light-years away in the constellation of Lyra. The primary star is slightly more massive than our Sun, but cooler being a type K star. Therefore, it is a subgiant clearly more evolved than the Sun. In visual light it is four times brighter than the Sun, but because of its distance, about 205 light years, it is not visible to the unaided eye.

Wright et al.

HD 178911 Bb

HD 181433 b is an extrasolar planet located approximately 87 light years away in the constellation of Pavo, orbiting the star HD 181433. This planet has mass at least 7.56 times that of Earth. This planet is classified as a super-Earth and orbits at 0.080 AU and varies only about 0.063 AU with an eccentricity of 0.396. François Bouchy et al. have published a paper detailing the HD 181433 planetary system in Astronomy and Astrophysics.

G5Ia

HD 181342 b is an extrasolar planet orbiting the K-type star HD 181342 approximately 361 light years away in the constellation Sagittarius.

HD 175740, BD+41°3177B and BD+41° 3177C are components of a double star in the constellation Lyra, approximately 270 light years away from Earth. The most luminous star, 5th magnitude HD 175740, is a yellow giant star of the spectral type G8III. It therefore has a surface temperature of 5,000 to 6,000 kelvins, in the same range as that of our Sun, though it is much larger and brighter in comparison. BD+41°3177B is a 13th magnitude star of an unknown spectral type.

HD 176527 is a 5th magnitude star in the constellation Lyra, approximately 350 light years away from Earth. It is an orange giant star of the spectral type K2III. It therefore has a surface temperature of 3,500 to 5,000 kelvins and is much larger and brighter, yet cooler, than our Sun.

HD 174179 is a 6th magnitude star in the constellation Lyra, approximately 1,100 light years from Earth. It is a bluish white subgiant star of the spectral type B3IVp, meaning it possesses a surface temperature of 11,000 to 25,000 kelvins. Its surface is at least twice as hot as the Sun, and it is larger and brighter in comparison. The "p" in its spectral type signifies that there is an unspecified peculiarity with the star's spectrum.

A9V

F8 V

HD 183263 c

HD 173416 is an intermediate-mass giant star in the constellation Lyra. It is a 6th magnitude star, relatively bright for its distance of about 440 light years from Earth.

HD 181342 is a star in the constellation of Sagittarius. With an apparent magnitude of 7.55, it cannot be seen with the naked eye. Parallax measurements made by Hipparcos put the star at a distance of 360 light-years (111 parsecs) away.HD 181342 is a K-type red giant star. It was formerly an A-type main-sequence star, but at an age of 1.56 billion years it has swelled up to a size of 4.55 solar radii. It is currently 1.78 times the mass of the Sun, 16.2 times as luminous, and its surface temperature is 4976 K.

HD 179821 is a yellow supergiant star in the constellation of Aquila, surrounded by a detached dust shell. It is a semi-regular variable and either a moderate-mass post-AGB star or distant massive yellow hypergiant.

HD 181433 c

G7IIIa

HD 173936 is a 6th magnitude star in the constellation Lyra, approximately 1200 light years away from Earth. It is a bluish white star of the spectral type B6V. It is therefore a dwarf star, like our Sun, with a surface temperature of 11,000 to 25,000 kelvins. It is at least twice as hot and many times brighter than the Sun.

HD 185018 is supergiant star in the equatorial constellation of Aquila.

HD 181433 d is an extrasolar planet located approximately 87 light years away in the constellation of Pavo, orbiting the star HD 181433. This planet has a minimum mass of 0.54 Jupiter mass and takes 2172 days to orbit the star. The average orbital distance is 3.00 AU. At periastron distance, it will have distance from the star similar to Mars’ distance from the Sun at 1.56 AU. At apastron, the distance is 4.44 AU. These corresponds to the orbital eccentricity of 0.48.

G5IV

HD 173416 b is an extrasolar planet located approximately 440 light years away in the constellation of Lyra, orbiting the 6th magnitude G-type giant star HD 173416. This is planet has at least 2.7 times the mass of Jupiter and was discovered on January 10, 2009 by Liu et al. HD 173416 b orbits at 1.16 AU from the star. However, despite the fact that the planet orbits 16% further from the star than Earth does from the Sun, it has orbital period of only 323.6 days, compared to 365.25 days for Earth. This inverse relationship is caused by the parent star having twice the mass of our Sun, which increases the strength of its gravitational field. This evidence implies that when this star was on the main sequence, it was an A-type star.

radial velocity

HD 181433 c is an extrasolar planet located approximately 87 light years away in the constellation of Pavo, orbiting the star HD 181433. This planet has mass at least 0.64 times that of Jupiter and takes 962 days to orbit the star at an orbital distance of 1.76 AU or 263 Gm. However, the orbit is eccentric, which ranges from 1.27 AU (190 Gm) at periastron to 2.25 AU (337 Gm) at apastron. François Bouchy et al. have published a paper detailing the HD 181433 planetary system in Astronomy and Astrophysics.

HD 175541 b

HD 179079 b

HD 180314 b

HD 175541 b is a jovian planet located approximately 410 light-years away in the constellation of Serpens, orbiting the star HD 175541. This planet was discovered in April 2007. Despite the distance of planet to star slightly more than Earth to the Sun, the period is less than 300 days that orbits in an eccentric orbit, because the parent star is 65% more massive than our Sun.The discovery of this planet and two others: HD 192699 b and HD 210702 b around intermediate-mass stars provide clues about the formation and history of migration of planets around the A-type stars.

HD 179949 b is an extrasolar planet discovered by the Anglo-Australian Planet Search at the Anglo-Australian Observatory, which orbits the star HD 179949. The planet is a so-called "hot Jupiter", a Jupiter-mass planet orbiting very close to its parent star. In this case, orbital distance is almost one-tenth that of Mercury from the Sun. One orbital revolution lasts only about 3 days.Its magnetic field induces a bright spot on its star at 30 degrees latitude, which rotates at 87 degrees inclination. If the planet orbited at 83-97 degrees, then its transit would be visible from Earth. The angle of inclination is therefore 83 degrees or less, but not much less; and its mass is constrained to not much more than 0.923±0.077. The star is not tidally locked to the planet.Assuming the planet is perfectly grey with no greenhouse or tidal effects, and a Bond albedo of 0.1, the temperature would be 1533 K. This is, like Tau Boötis b, hotter than the predicted temperature of HD 209458 b (1392K), and close to that of HD 149026 b, before they were measured.Searches for water in the planet's atmosphere have been inconclusive at first, as have attempts to determine whether titanium and vanadium oxides are present. In the meantime, both carbon monoxide and water have been found in the dayside emission of HD 179949b.HD 179949 b is a candidate for "near-infrared characterisation.... with the VLTI Spectro-Imager".

"note"

HD 183263 b is an extrasolar planet orbiting the star HD 183263. This planet has a minimum mass of 3.6 times more than Jupiter and takes 625 days to orbit the star. The planet was discovered on January 25, 2005 using multiple Doppler measurements of five nearby FGK main-sequence stars and subgiants obtained during the past 4–6 years at the Keck Observatory in Mauna Kea, Hawaii. These stars, namely, HD 183263, HD 117207, HD 188015, HD 45350, and HD 99492, all exhibit coherent variations in their Doppler shifts consistent with a planet in Keplerian motion, and the results were published in a paper by Geoffrey Marcy et al. Photometric observations were acquired for four of the five host stars with an automatic telescope at Fairborn Observatory. The lack of brightness variations in phase with the radial velocities supports planetary-reflex motion as the cause of the velocity variations. An additional planet in the system was discovered later.

HD 183144 is suspected variable star in the equatorial constellation of Aquila.

HD 177830 c

approx. 410

−4.30

HD 180314 is a star in the constellation Lyra. Its apparent magnitude is 6.61 and it is about 400 light years from the Sun. This is a K-type star with 2.48 times the mass of the Sun, 8.10 times the Sun's radius, and an effective temperature of about 5,000 K.The star is orbited by one substellar companion, HD 180314 b, an object with a minimum mass 22 times that of Jupiter and hence likely to be a brown dwarf. It orbits HD 180314 every 396 days with a semi-major axis of 1.4 AU. HD 180314 b's orbit is moderately eccentric, with an orbital eccentricity of 0.257.

Published

K5III

HD 181342 is a star in the constellation of Sagittarius. With an apparent magnitude of 7.55, it cannot be seen with the naked eye. Parallax measurements made by Hipparcos put the star at a distance of 360 light-years (111 parsecs) away.HD 181342 is a K-type red giant star. It was formerly an A-type main-sequence star, but at an age of 1.56 billion years it has swelled up to a size of 4.55 solar radii.

La Silla Observatory

Tmin

HD 181433b

HD 175167 b is an extra-solar planet orbiting HD 175167, which is a G type star within the Pavo constellation around 219 light years away from the Earth. The planet was discovered by the Magellan Planet Search Program as the astronomical object fit the Keplerian orbital model. During the observations 13 doppler velocity tests were conducted, which showed this object’s size was at least 7.8 Jovian-masses and its orbit has a high eccentricity.

HD 181068C

HD 178911 is a triple star system in the constellation Lyra. The secondary star (designated as HD 178911 B) has an apparent magnitude of 6.74 and a spectral type of G1V, which is very similar to our Sun at a distance of 160 light years. The age of the star is slightly older and have significantly higher metallicity than our Sun.

HD 185435 is a star in the constellation Cygnus. Its apparent magnitude is 6.42.

HD 185269 b is a hot Jupiter extrasolar planet approximately 171 light years away in the constellation of Cygnus. The minimum mass is slightly less than Jupiter and the orbital period is about one week. Most hot Jupiters are thought to have undergone tidal circularization, making the eccentricity of HD 185269 b (e=0.3) unusual. Despite having a large transit probability, none have yet been detected by various photometric monitoring campaigns.The planet was discovered nearly simultaneously by Johnson et al. as part of a search for planets around subgiants, and by Moutou et al. as part of a search for planets around metal-rich stars (the submission dates to the journals ApJ and Astronomy and Astrophysics were separated by only 9 days).

HD 175541 is an intermediate-mass subgiant star in the constellation Serpens. That means when this star was a main-sequence, it was an A-type star. It is an 8th magnitude star about 410 light years from Earth.

Marcy et al.

G0 V + K1 V

HD 181342 b

Valenti et al.

HD 179079b

HD 185269b

HD 173780 is a 5th magnitude star in the constellation Lyra, approximately 250 light years away from Earth. It is an orange giant star of the spectral type K3III, meaning it has a surface temperature of 3,500 to 5,000 kelvins. It is much bigger and brighter than our Sun, yet cooler.

HD 181720 b is an extrasolar planet which orbits the G-type main sequence star HD 181720, located approximately 190 light years away in the constellation Sagittarius. This planet has at least three-eighths the mass of Jupiter and takes over two and five-eighths years to orbit the star at a semimajor axis of 1.78 AU with an eccentricity of 0.26. This planet was detected by HARPS on October 19, 2009, together with 29 other planets.

HD 181720b

HD 179949b

HD 180902 b is an extrasolar planet orbiting the K-type star HD 180902 approximately 323 light years away in the constellation Sagittarius.

HD 172044 and BD+33°3154B are two components of a binary star system in the constellation Lyra, approximately 520 light years away from Earth. 5th magnitude HD 172044 is a giant or subgiant star with the spectral type B8II-IIIp... The "p..." signifies that the star has a peculiar spectrum and spectral peculiarities have yet to be described. It is bluish white in color and has a surface temperature of 11,000 to 25,000 kelvins.

HD 181433 c is an extrasolar planet located approximately 87 light years away in the constellation of Pavo, orbiting the star HD 181433. This planet has mass at least 0.64 times that of Jupiter and takes 962 days to orbit the star at an orbital distance of 1.76 AU or 263 Gm. However, the orbit is eccentric, which ranges from 1.27 AU (190 Gm) at periastron to 2.25 AU (337 Gm) at apastron. François Bouchy et al.

HD 181433 b

Santos et al.

HD 179079 is a G-type subgiant star in the constellation of Aquila. It has an apparent visual magnitude of approximately 7.96. It is larger than our Sun as it has a radius of approximately 1.48 solar radii. An exoplanet, HD 179079 b, was announced in August 2009 to be orbiting this star. The planet was detected by the radial velocity method, using the HIRES spectrometer at Keck Observatory.

HD 185269 b

Confirmed

HD 182475 is a Delta Scuti variable star in the equatorial constellation of Aquila.

HD 181068 A

B4III

HD 183263 b is an extrasolar planet orbiting the star HD 183263. This planet has a minimum mass of 3.6 times more than Jupiter and takes 625 days to orbit the star. The planet was discovered on January 25, 2005 using multiple Doppler measurements of five nearby FGK main-sequence stars and subgiants obtained during the past 4–6 years at the Keck Observatory in Mauna Kea, Hawaii.

none

Lick and Keck Observatories

HD 183263 b

approx. 130

K0 III/IV

HD 181068A

HD 176051 is a spectroscopic binary star system approximately 49 light years away from Earth in the constellation Lyra. The pair orbit with a period of 22,423 days (61.4 years) and an eccentricity of 0.25. Compared to the Sun, they have a somewhat lower proportion of elements more massive than helium. Their individual masses are estimated at 1.07 and 0.71 solar masses (M☉). The system is moving closer to the Sun with a radial velocity of −47 km/s and will reach perihelion in about 269,000 years when it comes within roughly 17 ly (5.1 pc) of the Sun.

HD 181720 b

G8II-III + A1V

G8III

HD 183263b

HD 181068 is a star system in the constellation of Lyra. With an apparent magnitude of 7.09, the system is not visible to the naked eye but may be viewed with a pair of binoculars. Based on parallax measurements made by the Hipparcos spacecraft, the system is some 810 light years (250 parsecs) away from Earth.HD 181068 is in the Kepler spacecraft's field of view, and its unique properties were first observed by the satellite's photometer.

HD 183263c

HD 176051 is a spectroscopic binary star system approximately 49 light years away from Earth in the constellation Lyra. The pair orbit with a period of 22,423 days (61.4 years) and an eccentricity of 0.25. Compared to the Sun, they have a somewhat lower proportion of elements more massive than helium. Their individual masses are estimated at 1.07 and 0.71 solar masses (M☉).

Moutou and Johnson et al.

HD 179949 b is an extrasolar planet discovered by the Anglo-Australian Planet Search at the Anglo-Australian Observatory, which orbits the star HD 179949. The planet is a so-called "hot Jupiter", a Jupiter-mass planet orbiting very close to its parent star. In this case, orbital distance is almost one-tenth that of Mercury from the Sun.

HD 177830 b

−1.20

HD 180902b

HD 176051b

HD 176051 b

HD 181068 B

Liu et al.

Radial velocity

HD 173416 b is an extrasolar planet located approximately 440 light years away in the constellation of Lyra, orbiting the 6th magnitude G-type giant star HD 173416. This is planet has at least 2.7 times the mass of Jupiter and was discovered on January 10, 2009 by Liu et al. HD 173416 b orbits at 1.16 AU from the star.

K0 III

HD 181068 is a star system in the constellation of Lyra. With an apparent magnitude of 7.09, the system is not visible to the naked eye but may be viewed with a pair of binoculars. Based on parallax measurements made by the Hipparcos spacecraft, the system is some 810 light years (250 parsecs) away from Earth.HD 181068 is in the Kepler spacecraft's field of view, and its unique properties were first observed by the satellite's photometer. It consists of a red giant, designated HD 181068 A, along with two main-sequence stars, designated HD 181068 Ba and HD 181068 Bb, respectively. Normal eclipsing binaries have two components that pass in front of each other while eclipsing. However, all three components of HD 181068 orbit each other in such a way that they eclipse each other, forming a rare triply eclipsing system.The primary, HD 181068 A, has a spectral type of G8III, meaning it is a red giant that has used up its core hydrogen and has expanded to a radius of 12.46 R☉. The primary star is also unusual in that it does not exhibit internal seismic oscillations as have been detected in other red giants, although tidal forces from the closer pair may possibly be causing other variability in the light curve of the system.HD 181068 Ba and Bb have spectral types of G8V and K1V respectively, indicating their location on the main sequence, slightly later than the Sun. They are in a close orbit and complete an orbit once every 0.906 days (about 21.7 hours), while they orbit HD 181068 A every 45.5 days. All three stars have similar surface brightnesses and colors, so when the two companions eclipse the red giant, the change in brightness is very slight and hard to detect.

HD 177830b

HD 181068B

and Keck Observatory

Arriagada et al.

−8.9